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All pktgen samples can use the environment variable instead of option
parameters(eg. $DEV is able to use instead of '-i' option).
This is results of running sample as root and user:
// running as root
# DEV=eth0 DEST_IP=10.1.0.1 DST_MAC=00:11:22:33:44:55 ./pktgen_sample01_simple.sh -v -n 1
Running... ctrl^C to stop
// running as normal user
$ DEV=eth0 DEST_IP=10.1.0.1 DST_MAC=00:11:22:33:44:55 ./pktgen_sample01_simple.sh -v -n 1
[...]
ERROR: Please specify output device
This results show the sample doesn't work properly when the sample runs
as normal user. Because the sample is restarted by the function
(root_check_run_with_sudo) to run with sudo. In this process, the
environment variable of normal user doesn't propagate to sudo.
It can be solved by using "-E"(--preserve-env) option of "sudo", which
preserve normal user's existing environment variables. So this commit
adds "-E" option in the function (root_check_run_with_sudo).
Signed-off-by: Juhee Kang <claudiajkang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7caeabd726